The system of equations is graphed on the coordinate plane.
y = -x - 2
y = 3x + 2
enter the coordinates of the solution to the system of equations below
( ? , ? )

The verbal translation for the difference of m and 7 increased by 15

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.